This set contains flashcards in base ten format (longs and unit cubes) from 0-100. Use them in a whole class setting on the Smart board or under the Elmo to see who can identify the number represented on the card. Send home to parents to reinforce base-ten fluency or have students label each card as an exit ticket. I also like to keep a few sets cut for them to use at math centers. Students can play games to see who has the bigger quantity (as in the card game commonly known as "War"). The more exposure students have to the visual of separating numbers into tens and ones the more automatic it will become for them to do independently.